Probably worth more trouble than its worth, but it seems evident my last post wasn't clear.
-The study incorporates the presumption that the gays in our society are all gay for the same reason (despite its disclaimer).
-The authors devised a theory, and then combed and harvested previously collected data to support their theory, further polluting the focus of the control group used to comprise the data. Thus, despite any disclaimers, there was absolutely no way to impose controls on the study group, or even to edit the 'database' of information for some semblence of controlled application. Basically its just a mathematical theory of social behavior using Bayesian statistics. We all know how statistics can be used, right?
-A big, big problem is the failure to recognize that the human brain - which includes social centers and mirror neurons for mimmicking behaviors - are programmable, not "some of the time" but ALL of the time, as a matter of evolutionary survival.
-Study ignores that human are cognitively driven, sentient animals capable of rational choice. This is important because it ignores that some people are selecting homosexuality by choice (or even bisexuality) AND ignores that females choices of mates are socially driven (despite any genetic predisposition imposed by the authors), although the latter is post-copulatory.
-Study ignores that effeminate physical characteristics are passed from male to male and from female to female: Offspring favor the gender as a matter of evolutionary survival. There is NO evidence that this new-fangled "antagonistic selection" overrides this dominating characteristic of genetic expression, or that this particular characteristic of genetic expression transmutes from the animal kingdom to humans (who have a much more highly developed central nervous system).
-The fact that it doesn't explain female homosexuality, or even compare per capita rates, dramatically undermines the plausibility of the whole theory.
-The bottom line is that the study completely avoids a number of easier, more plausible answers to a question that doesn't really matter anyway, and whose purpose is suspect (who cares why someone is gay, or how many per capita gays there are?)